Theorem dp2eq1

Description: Equality theorem for the decimal expansion constructor. (Contributed by David A. Wheeler, 15-May-2015)

	Ref	Expression
Assertion	dp2eq1	Could not format assertion : No typesetting found for |- ( A = B -> _ A C = _ B C ) with typecode |-

Proof

Step	Hyp	Ref	Expression
1		oveq1	$$⊢A=B\to A+\left(\frac{C}{10}\right)=B+\left(\frac{C}{10}\right)$$
2		df-dp2	Could not format _ A C = ( A + ( C / ; 1 0 ) ) : No typesetting found for |- _ A C = ( A + ( C / ; 1 0 ) ) with typecode |-
3		df-dp2	Could not format _ B C = ( B + ( C / ; 1 0 ) ) : No typesetting found for |- _ B C = ( B + ( C / ; 1 0 ) ) with typecode |-
4	1 2 3	3eqtr4g	Could not format ( A = B -> _ A C = _ B C ) : No typesetting found for |- ( A = B -> _ A C = _ B C ) with typecode |-